helllo,
when i’m printing the belts on the pulley from the x motor are rubbing against each other and this makes that the belts are frayed out.
how can is solve this?
You can tilt the X or Y (or both if they are both rubbing) motor(s) a bit so the pulley creates a slope that pushes the short belt out of the way of the other belt. Just think carefully which way to tilt the motor :). The tilt should also be very little as not much is needed to move the belt a bit.